Acus Valmont de Bomare [J. C.] 1791 [ref. 4508]. Fem. Original not seen. Not available, published in a rejected work on Official Index (Opinion 89, Direction 32). •In the synonymy of Syngnathus Linnaeus 1758. Current status: Synonym of Syngnathus Linnaeus 1758. Syngnathidae: Syngnathinae.

Hippocampus Perry [G.] 1810:Pl. XVIII [ref. 12255]. Masc. Syngnathus folilatus Perry 1810 Type by monotypy. Published in "Arcana 1810". Objectively invalid; preoccupied by Hippocampus Rafinesque 1810 which predates Hippocampus Perry by one month according to R. Petit (pers. comm. 9/19/2003). Published a second time in Perry 1810 in text to Pl. 18; said by Perry 1810 that it is not the same as Hippocampus Declared a nomen protectum by Kottelat 2013:304 [ref. 32989]. Current status: Synonym of Hippocampus Rafinesque 1810. Syngnathidae: Syngnathinae.

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